查询词典 leaching nitrate

A new recovery technology of solid waste was made which is from furfuryl alcohol production by furfural hydrogenization. When the solid waste is placed in a vacuum drying box, and is under lower negative pressure and at 130℃, the organic materials in solid waste can be distilled and then returned to the refining workshop to produce qualified furfuraldehyde and furfuryl alcohol. The remainder is mixed with soda ash and roasted in a reverberating furnace. The sodium chromate can be obtained by leaching. Rough cupric oxide is dissolved in nitric acid and cupric nitrate is obtained. A new catalyst was prepared by the above sodium chromate and cupric nitrate and used in furfuryl alcohol production.

将糠醛液相加氢生产糠醇产生的废渣置于真空干燥箱中，在较低的负压状态下保持130℃的温度，蒸馏回收废渣中的有机物，返回糠醇精制车间获得合格的糠醇与糠醛产品；剩余的固体废弃物与纯碱混合，在反射炉中焙烧，浸取获得铬酸钠水溶液；最后剩下的粗氧化铜溶于硝酸得到硝酸铜溶液；将铬酸钠溶液、硝酸铜溶液按一定比例混合，加入氨水搅拌，分离出的沉淀经传统方法焙烧活化、造粒制得新催化剂，回用于糠醛液相加氢生产糠醇。

Fertilizer Entec26 contained DMPP (new type of nitrification inhibiter) could also decrease soil nitrate leaching.

证明在高灌水量条件下，尿素+玉米秸杆处理，使土壤矿质氮固定和微生物氮增加，降低了土壤硝态氮的下层累积和向下淋洗；施用含新型硝化抑制剂DMPP的肥料Entec26也能降低土壤硝态氮的向下淋洗。

The function of lead salt s(such as lead nitrate,lead actate) in cyanide leaching of gold has been studied.

绘制了Au -Pb -CN -H2 O系的φ-pH图，研究了铅盐在氰化浸金过程中的作用。

A 6 years lysimeter experiment shows that an obvious nitrate leaching even occurred in semiarid area agroecosystem.

在不同深度的渗漏池，连续 6年( 11季作物)研究了半干旱地区农田生态系统中硝态氮的淋失。

It is apparent that a high degree of ammonia volatilization and/or nitrate leaching can occur in cropping systems susceptible to previously described conditions.

很明显，高的氨挥发和硝态氮的淋失会发生在符合上述条件的任何种植制度中。

Basial nitrogen fertilizer of traditional treatment can beget leaching loss of soil nitrate before top-dressing, but top-dressing beget hardly the leaching loss because cotton assimilated large numbers of nitrogen for accelerated growing.

传统处理施肥量高，基肥比例大易引起土壤硝态氮的淋移损失，损失数量与棉花生育时期有关，棉花生育期追氮由于棉花对氮素的大量吸收，硝态氮淋移损失相对较小。

2Soil column leachate experiment shows, soil texture and soil section form are the main factors affecting the nitrate leaching; in soil organic fertilizer produce a nitrate leaching process, during five-month experiment, nitrate content has be increasing in leakage solution, organic fertilizer applying decrease the pH and increase the electric conduction of leakage solution, there is positive action between nitrate content in leakage solution and electric conduction, which shows that nitrate-N accumulation during organic fertilizer applying is one of the main factors for soil salification; for decrease the leaching of the nitrate-N in soil, in sandy moisture soil the best amount of organic fertilizer should be 7.5～ 15 t·hm~(-2), in Loamy moisture

在小麦-玉米轮作体系上投入化肥氮300kg·hm~(-2)N和有机肥22.3t·hm~(-2)折N261.2kg·hm~(-2，能使农田氮素收支达到平衡，在兼顾环境效益的基础上获得了较高的产量效益。并通过肥料效应函数和硝态氮累积效应函数进一步预测最佳施肥组合，即化肥氮施用量为N226.5kg·hm~(-2)，有机肥用量为39.9t·hm~(-2)折N466.8kg·hm~(-2，其中小麦季施化肥氮105.85kg·hm~(-2)N、有机肥30t·hm~(-2)折N351kg·hm~(-2，玉米季施化肥氮120kg·hm~(-2)N，有机肥9.9t·hm~(-2)折N115.8kg·hm~(-2。同时，磷素平衡分析表明，在施用有机肥的基础之上，化学磷肥的施用量应适量的减少或不施。

Soil nitrate leaching not only causes the loss of fertilizer, but also brings about serious environmental problems.

土壤硝态氮的淋失不但造成肥料的损失，而且产生严重的环境问题。

The N input from rainfall in HPA was about 3 to 4 times higher than that in LPA and CK. However, the biomass of vegetables in HPA was decreased by up to 40%, when compared with that in CK, thus leading to a significant decrease in N output through crop harvesting. As a result, a large proportion of N was sequestrated in the soils subjected to acid rain, which subsequently enhanced nitrate leaching posing a risk to water environment.

在酸沉降重污染区，降水输入系统的氮远大于轻污染区和对照区（约3~4倍），同时因酸雨危害，蔬菜产量明显低于对照区，仅为对照区产量的60%，使系统中通过作物收获的氮输出减少，结果导致大量氮滞留于土壤中并以硝态氮等形态淋失，给水环境带来了氮污染风险。

Studies on effect of applying several new type nitrogen fertilizer on nitrate accumulation in two-reap leafy vegetable and soil nitrate leaching in high fertility vegetable by earth column simulation experiment method.

应用土柱模拟试验的方法，研究了在高肥力菜田土壤条件下，施用几种新型氮肥对两茬叶菜硝酸盐积累和土壤硝态氮淋洗的影响。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。